//
//  UIButton+Extension.swift
//  Weibo
//
//  Created by 张远文 on 16/4/27.
//  Copyright © 2016年 张远文. All rights reserved.
//

import UIKit

extension UIButton {

    //构造器
    convenience init(title: String?, backImage: String?, color: UIColor?, image: String = "", size: CGFloat = 14) {
        
        //调用构造方法实例化
        self.init()
        if title != nil {
            setTitle(title, forState: .Normal)
        }
        
        if backImage != nil {
            setBackgroundImage(UIImage(named: backImage!), forState: .Normal)
            setBackgroundImage(UIImage(named: backImage! + "_highlighted"), forState: .Highlighted)
        }
        
        titleLabel?.font = UIFont.systemFontOfSize(size)
        setImage(UIImage(named: image), forState: .Normal)
        
        if color != nil {
            setTitleColor(color, forState: .Normal)
        }
    }

}
